I believe the most valuable trait an organization can pass on to its members is a sense of value. Making an employee feel like they belong - that their contribution makes a difference - is what gives an organization its greatest strength. A supervisor must actively mentor their employees, providing them with the training and knowledge necessary for development of their skills. This isn't an easy task. Do too much and employees will feel they are being micromanaged and will avoid you. Do too little and employees will see their jobs as what they must do to earn a paycheck with little else to motivate them.
Imparting a sense of belonging is what brings a group together. Whether that is a company, a community, or a neighborhood, the principals are the same. A sense of value breeds confidence, and in turn productivity. People won't show up because they have to - they'll show up because they want to.